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Full text of "Handbook Of Chemical Engineering - I"

74
CHEMICAL ENGINEERING
costs   of  installation.    The   slopes   are   proportional   to   relative   costs   of operation.
POWER TRANSMISSION IN FACTORIES
Belting.—For very dry places, oak-tanned is the preferred leather belting. For damp places use rawhide or chrome-tanned or rubber belt. The last should not be used where it may be subjected to oil or grease. Canvas has about .the same strength as leather belting. Riveted or laced joints greatly reduce strength: cemented joints do not.
HOUSE-POWER TRANSMITTED BY TURNED STEEL LINE SHAFTING
Diameter of shaft, inches	Number of revolutions per minute										
	100	150	200	250	300	350	400	450	500	550	600
1H	3.7	5.6	7.5	9.4	11.2	13.1	15	16.9	18.8	20.5	22
W	4.8	7.1	9.5	11.9	14.3	16.6	19	21.0	24.0	26.0	28
IH	5.9	8.9	11.9	14.9	17.9	21.0	24	27.0	30.0	33.0	36
m	7.3	11.0	14.7	18.3	22.0	26.0	29	33.0	37.0	41.0	44
2	8.9	13.3	17.8	22.0	27.0	31.0	35	40.0	44.0	48.0	53
2M	10.6	16.0	21.0	27.0	32.0	37.0	43	48.0	53.0	58.0	64
2K	12.6	19.0	25.0	32.0	38.0	44.0	51	57.0	63.0	69.0	76
2%	14.9	22.0	30.0	37.0	45.0	52.0	60	67.0	74.0	81.0	89
m	17.4	26.0	35.0	43.0	52.0	61.0	69	78.0	87.0	96.0	104
2H	20.0	30.0	40.0	50.0	60.0	71.0	80	90.0	100.0	110.0	120
m	23.0	35.0	46.0	58.0	69.0	81.0	92	104.0	115.0	125.0	138
2%	26.0	40.0	53.0	66.0	79.0	92.0	105	119.0	132.0	145.0	158
3	30.0	45.0	60.0	75.0	90.0	105.0	120	135.0	150.0	165.0	180
3M	34.0	51.0	68.0	85.0	102.0	119.0	136	152.0	170.0	187.0	203
3K	38.0	57.0	76.0	95.0	114.0	134.0	153	172.0	191.0	210.0	229
3%	43.0	64.0	85.0	107.0	128.0	150.0	171	192.0	213.0	234.0	256
3K	48.0	72.0	95.0	119.0	143.0	167.0	190	214.0	238.0	262.0	286
3«	53.0	79.0	106.0	132.0	159.0	185.0	211	238.0	265.0	291.0	317
3%	59.0	88.0	117.0	146.0	176.0	205.0	234	264.0	293.0	322.0	351
3%	65.0	97.0	129.0	161.0	194.0	226.0	258	291.0	322.0	354.0	387
If Ti and T2 are tensions in pounds on the pulling and slack sides of a belt, respectively,
horsepower
= 0.0076 fa for low speeds,
0.0076/(I - x)a for high speeds, wvz -T- 2.6832, and (Ti - T2)v + 550.